CVE-2021-47101: asix: fix uninit-value in asix_mdio_read()
First published: Mon Mar 04 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: asix: fix uninit-value in asix_mdio_read() asix_read_cmd() may read less than sizeof(smsr) bytes and in this case smsr will be uninitialized. Fail log: BUG: KMSAN: uninit-value in asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] BUG: KMSAN: uninit-value in asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] drivers/net/usb/asix_common.c:497 BUG: KMSAN: uninit-value in asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497 asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] asix_check_host_enable drivers/net/usb/asix_common.c:82 [inline] drivers/net/usb/asix_common.c:497 asix_mdio_read+0x3c1/0xb00 drivers/net/usb/asix_common.c:497 drivers/net/usb/asix_common.c:497
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.15.12 | 5.15.12 |
| redhat/kernel | <5.16 | 5.16 |
| Linux Kernel | >=4.9<5.15.12 | |
| Linux Kernel | =5.16-rc1 | |
| Linux Kernel | =5.16-rc2 | |
| Linux Kernel | =5.16-rc3 | |
| Linux Kernel | =5.16-rc4 | |
| Linux Kernel | =5.16-rc5 | |
| Linux Kernel | =5.16-rc6 | |
| IBM Security Verify Governance - Identity Manager | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Software Stack | <=ISVG 10.0.2 | |
| IBM Security Verify Governance, Identity Manager Virtual Appliance | <=ISVG 10.0.2 | |
| IBM Security Verify Governance Identity Manager Container | <=ISVG 10.0.2 | |
| debian/linux | <=5.10.223-1<=5.10.234-1 | 6.1.129-1 6.1.133-1 6.12.21-1 6.12.22-1 |
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Reference Links
- https://access.redhat.com/security/cve/CVE-2021-47101
- https://lore.kernel.org/linux-cve-announce/2024030415-CVE-2021-47101-f3fa@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:7000
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2267916
- https://git.kernel.org/stable/c/8035b1a2a37a29d8c717ef84fca8fe7278bc9f03
- https://git.kernel.org/stable/c/d259f621c85949f30cc578cac813b82bb5169f56
- https://launchpad.net/bugs/cve/CVE-2021-47101
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-47101
- https://nvd.nist.gov/vuln/detail/CVE-2021-47101
- https://security-tracker.debian.org/tracker/CVE-2021-47101
- https://ubuntu.com/security/CVE-2021-47101
- https://git.kernel.org/linus/8035b1a2a37a29d8c717ef84fca8fe7278bc9f03
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2021-47101?
CVE-2021-47101 has a medium severity rating due to potential uninitialized value exposure in the Linux kernel's asix driver.
How do I fix CVE-2021-47101?
To fix CVE-2021-47101, update your Linux kernel to versions 5.15.12, 5.16, or the specified secure versions listed for Debian.
Which versions of the Linux kernel are affected by CVE-2021-47101?
CVE-2021-47101 affects several versions of the Linux kernel prior to 5.15.12 and various releases in the 5.16 and prior ranges.
Is CVE-2021-47101 exploitable in production environments?
CVE-2021-47101 may be exploitable in production environments if the vulnerable kernel version is deployed and facing network access.
Where can I find more information about CVE-2021-47101?
Detailed information and patches regarding CVE-2021-47101 can be found in the Linux kernel's release notes and security advisories.
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